Federal Spec. Vehicles
Procedure1. CHECK CAMSHAFT POSITION SENSOR AIR GAP.
- Using a thickness gauge, measure the air gap between the signal rotor and pickup coil projection.
Air gap: 0.2 - 0.4 mm (0.008 - 0.016 in)
- If the air gap is not as specified, replace the distributor housing assembly.
2. INSPECT CAMSHAFT POSITION SENSOR RESISTANCE.
- Using an ohmmeter, measure the resistance between the terminals G(+) and G(-).
Resistance {G(+) to G(-)} (Cold): 185 - 275 Ohms
Resistance {G(+) to G(-)} (Hot): 240 - 325 Ohms
NOTE: Cold and Hot in the preceding specifications expresses the temperature of the coil itself.
Cold is from -10°C (14°F) to 50°C (122°F)
Hot is from 50°C (122°F) to 100°C (212°F).
- If the resistance is not as specified, replace the distributor housing assembly.
NOTE: For G signal circuit testing procedures, refer to DTC 12 and DTC 13 under the "Trouble Code Charts".
Testing and Inspection